x²-4y²/x²+4x+4*x+2/3x²-6xy
A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y,若x=
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若x
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
(2x²y-3xy²)-3(x²y-2xy²)+2(x²y-4xy
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
-3(2x²-xy)+4(x²+xy-6)
x-2y=5 xy=-2.x²+4y²=?(x+2y)²=?x²-3x-6x+6
(x-6y)/(x²-4y²)+(2y)/(x²-2xy)
(-x-2y)(x²-2xy+4y²)
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
x四次方+x³-3x²-4x-4 x(x-1)+y(y+1)-2xy (x-2)³-(y-